It is possible to convert a three-prong dryer cord to a four-prong dryer cord, but not the actual plug on the original cord. By following a simple conversion process, it is possible to use an old dryer even in a home with an updated 220-volt outlet.
Four-prong dryer cords used for this conversion task are also called "pigtails." This piece of equipment can be purchased at a local home improvement store, making it easy to tackle the conversion of the old cord alone. If necessary, a homeowner can have an electrician or appliance repair person handle the conversion in a professional manner.